Manufacturing & Production Engineering 1000+ MCQ with answer for IIFT

1. In a planer
A. Tool is stationary and work reciprocates
B. Work is stationary and tool reciprocates
C. Tool moves over stationary work
D. Tool moves over reciprocating work
Answer : A

2. The work or surface speed for cylindrical grinding varies from
A. 5 to 10 m/min
B. 10 to 20 m/min
C. 20 to 30 m/min
D. 40 to 60 m/min
Answer : C

3. The grade of grinding wheel depends upon
A. Hardness of the material being ground
B. Speed of wheel and work
C. Condition of grinding machine
D. All of these
Answer : D

4. The hard grade grinding wheels are denoted by the letters
A. A to H
B. I to P
C. Q to Z
D. A to P
Answer : C

5. The cutting speed is minimum while machining _________ with a high speed steel tool.
A. Cast iron
B. Mild steel
C. Brass
D. Aluminium
Answer : A

6. Misrun is a casting defect which occurs due to
A. Very high pouring temperature of the metal
B. Insufficient fluidity of the molten metal
C. Absorption of gases by the liquid metal
D. Improper alignment of the mould flasks
Answer : B

7. The operation in which oil is permeated into the pores of a powder metallurgy product is known as
A. Mixing
B. Sintering
C. Impregnation
D. Infiltration
Answer : C

8. In centreless grinding, work place centre will be
A. Above the line joining the two wheel centres
B. Below the line joining the two wheel centres
C. On the line joining the two wheel centres
D. At the intersection of the line joining the wheel centres with the work place plane
Answer : A

9. Tool life is generally better when
A. Grain size of the metal is large
B. Grain size of the metal is small
C. Hard constituents are present in the microstructure of the tool material
D. None of the above
Answer : A

10. The operation of machining several surfaces of a workpiece simultaneously is called
A. Profile milling
B. Gang milling
C. Saw milling
D. Helical milling
Answer : B

11. The helix angle of a drill is __________ for drilling brass.
A. Equal to 30°
B. Less than 30°
C. More than 30°
D. None of these
Answer : B

12. The object of caulking in a riveted joint is to make the joint
A. Free from corrosion
B. Stronger in tension
C. Free from stresses
D. Leak-proof
Answer : D

13. Broaching is applied for machining
A. Internal and external surfaces
B. Round or irregular shaped holes
C. External flat and contoured surfaces
D. All of these
Answer : D

14. In a metal arc welding process, metal transfer across the arc may take place by a method of material transfer where the metal transfers across the arc is in larger drops. This is at the rate of 100 drops / sec or less, what is this known as
A. Globular transfer
B. Spray transfer
C. GMAW practice
D. Dip transfer
Answer : D

15. When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
A. Electrochemical machining
B. Electro-discharge machining
C. Ultrasonic machining
D. None of these
Answer : B

16. Down milling is also called
A. Conventional milling
B. Climb milling
C. End milling
D. Face milling
Answer : B

17. Which of the following statement is wrong?
A. The larger side rake angle produces chipping.
B. The smaller rake angle produces excessive wear and deformation in tool.
C. The side cutting edge angle (less than 15°) increases tool life.
D. The increase in nose radius decreases tool life.
Answer : D

18. A grinding wheel is said to be of _________ if it holds the abrasive grains more securely.
A. Soft grade
B. Medium grade
C. Hard grade
D. None of these
Answer : C

19. Relief angles on high speed steel tools usually vary from
A. 0° to 3°
B. 3° to 10°
C. 10° to 20°
D. 20° to 30°
Answer : D

20. In hot machining, tool is made of
A. Tungsten carbide
B. Brass or copper
C. Diamond
D. Stainless steel
Answer : A

21. Trepanning is performed for
A. Finishing a drilled hole
B. Producing a large hole without drilling
C. Truing a hole for alignment
D. Enlarging a drilled hole
Answer : B

22. The width of cutting edge of a parting off tool varies from
A. 3 to 12 mm
B. 5 to 20 mm
C. 8 to 30 mm
D. 15 to 40 mm
Answer : A

23. While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
A. Independent of index change gear ratio
B. Dependent on speed change gear ratio
C. Interrelated to index change gear ratio
D. Independent of speed and index change gear ratio
Answer : C

24. In drilling brass, a drill with
A. Zero helix angle is used
B. Low helix angle is used
C. High helix angle is used
D. Any helix angle can be used
Answer : B

25. The lip angle of a single point tool is usually
A. 20° to 40°
B. 40° to 60°
C. 60° to 80°
D. None of these
Answer : C

26. In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate
A. Increases continuously
B. Decreases continuously
C. Decreases, becomes stable and then increases.
D. Increases, becomes stable and then decreases.
Answer : D

27. In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
A. 3500?C
B. 3200?C
C. 2900?C
D. 2550?C
Answer : B

28. A twist drill is specified by its
A. Shank, material and diameter
B. Shank, lip angle and size of flute
C. Material, length of body and helix angle
D. Any one of these
Answer : A

29. The angle between the lathe centres is
A. 30°
B. 45°
C. 60°
D. 90°
Answer : C

30. The usual value of the point angle of a drill is
A. 70°
B. 100°
C. 118°
D. 130°
Answer : C

31. In hot machining, the work is heated by
A. Simple heating
B. Flame heating
C. Induction heating
D. Any one of these
Answer : D

32. The broaching operation in which the work moves past the stationary tool is called
A. Pull broaching
B. Push broaching
C. Surface broaching
D. Continuous broaching
Answer : D

33. A coarse grained grinding wheel is used to grind
A. Hard and brittle materials
B. Soft and ductile materials
C. Hard and ductile materials
D. Soft and brittle materials
Answer : B

34. High speed steel cutting tools operate at cutting speeds _________ than carbon steel tools.
A. 2 to 3 times lower
B. 2 to 3 times higher
C. 5 to 8 times higher
D. 8 to 20 times higher
Answer : B

35. Side rake angle of a single point cutting tool is the angle
A. By which the face of the tool is inclined towards back
B. By which the face of the tool is inclined sideways
C. Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool
D. Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base
Answer : B

36. In centreless grinders, the regulating wheel is inclined at
A. 0° to 8°
B. 9° to 15°
C. 16° to 20°
D. 21° to 25°
Answer : A

37. Tumbler gears in lathe are used to
A. Reduce the spindle speed
B. Cut gears
C. Give desired direction of movement to the lathe carriage
D. Drill a workpiece
Answer : C

38. Which of the following statement is correct about hot machining?
A. It requires less power than machining metals at room temperature.
B. The rate of tool wear is lower.
C. It is used for machining high strength and high temperature resistant materials.
D. All of the above
Answer : D

39. In ECM, the material removal is due to
A. Corrosion
B. Erosion
C. Fusion
D. Ion displacement
Answer : D

40. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)
A. VⁿT = C
B. VTⁿ = C
C. Vⁿ/T = C
D. V/Tⁿ = C
Answer : B

41. The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
A. Mild steel
B. Copper
C. Aluminium
D. Brass
Answer : A

42. The angle between the shear plane and __________ is called shear angle.
A. Work surface
B. Tool face
C. Machine surface
D. None of these
Answer : A

43. For softer materials, the point angle of the drill is kept
A. Equal to 118°
B. Less than 118°
C. More than 118°
D. Any one of these
Answer : B

44. For fast removal of materials during grinding, a _________ grinding wheel is used.
A. Course grained
B. Fine grained
C. Medium grained
D. None of these
Answer : A

45. The cutting fluid mostly used for machining alloy steels is
A. Water
B. Soluble oil
C. Dry
D. Sulphurised mineral oil
Answer : D

46. The lathe spindles are usually made hollow and provided with
A. Internal taper
B. External taper
C. Internal and external taper
D. No taper
Answer : A

47. In up-cut milling the work piece is fed
A. Against the rotating cutter
B. At angle of 60° to the cutter
C. In the direction of the cutter
D. At the right angle to the cutter
Answer : A

48. When the tool moves parallel to the lathe axis, the movement is termed as
A. Cross feed
B. Angular feed
C. Longitudinal feed
D. Any one of these
Answer : C

49. In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
A. Friction zone
B. Work-tool contact zone
C. Shear zone
D. None of these
Answer : A

50. The effective number of lattice points in the unit cell of simple cubic, body centred cubic, and face centred cubic space lattices, respectively, are
A. 1, 2, 2
B. 1, 2, 4
C. 2, 3, 4
D. 2, 4, 4
Answer : B